Concept: Pacific Coast League
The oxygen (18O/16O) isotope analysis of hair is commonly applied to reconstruct an individual’s residence history. However, region-of-origin as determined from oxygen isotope values (δ18O) alone is often spatially indistinct. Adding additional geochemical recorders can refine region-of-origin estimates. In this capacity, strontium (87Sr/86Sr) isotope analysis has attracted increased interest. While87Sr/86Sr reflects the influences of local geology,87Sr/86Sr of hair includes both external environmental signals as well as the internal dietary indicators. To better understand the impact of these contributions to the spatial signal encoded within87Sr/86Sr of hair, human hair was collected from three locations within Salt Lake City, Utah along with the donor’s sex. The87Sr/86Sr and δ18O of hair and local tap water were measured. There were no significant relationships between sex and either δ18O or87Sr/86Sr of hair, nor between collection location and the δ18O of hair. However, we found significant associations between collection location and87Sr/86Sr of hair. These findings suggest that interactions with local water may be an important source of Sr to human hair and that the87Sr/86Sr of hair may have the capacity to record differences in87Sr/86Sr of tap waters on small spatial scales.
The Nebraska Medical Center (TNMC) was conducting an Institutional Review Board approved research study utilizing the BioFire FilmArray Gastrointestinal Panel (BioFire Diagnostics, Salt Lake City, UT) when an outbreak of cyclosporiasis occurred in Iowa and Nebraska (1).…